Anything with Nogueira is awesome (Nog v Herring), Herring had all sorts of crazy escapes.
Silva v Jackson is awesomely awesome as well.

On a side note for the suckiest pride fights ever, I was dumb enough to buy a DVD with not one, but TWO shitty Gracie fights. Royler and Renzo against random sucky Japanese dudes, who just lay on them for something like 5 rounds (of 10 minutes), doing absolutely nothing. This was before the new time limits on rounds, but god I felt cheated.